Papermaking

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The Experts below are selected from a list of 15963 Experts worldwide ranked by ideXlab platform

Travis Taylor - One of the best experts on this subject based on the ideXlab platform.

Barbara Surma-Ślusarska - One of the best experts on this subject based on the ideXlab platform.

  • Properties and fibre characterisation of bleached hemp, birch and pine pulps: a comparison
    Cellulose, 2017
    Co-Authors: Dariusz Danielewicz, Barbara Surma-Ślusarska
    Abstract:

    The Papermaking potential of bleached kraft pulps made from hemp stalks, hemp woody-core and hemp bast fibres was studied and compared with that of bleached birch pulp and pine kraft pulp. It has been shown that among the pulps from these raw materials, hemp stalk pulp has the most useful properties for Papermaking. The disadvantages of hemp woody-core pulp and hemp bast fibre pulp as Papermaking intermediates proved to be low tear resistance and low tensile strength, respectively. Results indicate that the main reasons for the low tensile strength of hemp bast fibre pulp are the low susceptibility of their fibres for internal fibrillation and low hemicellulose content. The technology used in this work for the processing of hemp bast fibres into Papermaking pulp made it possible to obtain pulp with high α -cellulose content from this fibrous raw material with a high yield in a much simpler way than when such pulps are obtained from wood.

Jouko Niinimäki - One of the best experts on this subject based on the ideXlab platform.

  • Nonwood Pulp Constituents: Part I - the Effect on Pulp and Paper Properties
    2020
    Co-Authors: Paivi Rousu, Jouko Niinimäki
    Abstract:

    Nonwood furnish is a more heterogeneous material than furnish made of wood, because of the wide variety of different cells in nonwood material. The nature of the material affects both pulping and Papermaking processes as well as paper quality, and therefore it is important to optimise fibre properties prior to Papermaking. Improvement of nonwood fibre properties requires more detailed information about the behaviour of different cell types in Papermaking. To evaluate the effects of different cell types on paper quality, a fractionation study was performed. It was concluded that parenchyma and epidermis cells have an important effect on pulp and paper functionality. Even though fines impair dewatering and tear properties, only partial removal of the fines fraction can be recommended, since fines have a positive impact on optical properties and in some pulp types on several tensile properties also.

  • Nonwood Pulp Constituents: Part I - the Effect on Pulp and Paper Properties
    2007
    Co-Authors: Paivi Rousu, Jouko Niinimäki
    Abstract:

    Pulp from nonwood material is more heterogeneous than pulp from wood, because of the wide variety of different cells in nonwood material. The nature of the material affects both pulping and Papermaking processes as well as paper quality, and therefore it is important to optimise fibre properties prior to Papermaking. Improvement of nonwood fibre properties requires more detailed information about the behaviour of different cell types in Papermaking. To evaluate the effects of different cell types on paper quality, a fractionation study was performed that clearly demonstrates the important effect that parenchyma and epidermis cells have on pulp and paper functionality. Even though fines impair dewatering and tear properties, only partial removal of the fines fraction can be recommended, since fines have a positive impact on optical properties and, in some pulp types, on several strength properties too. The results also confirm that pulp fraction properties cannot be simply used to predict properties of mixtures of these fractions.

Alain Dufresne - One of the best experts on this subject based on the ideXlab platform.

  • Review: nanoparticles and nanostructured materials in Papermaking
    Journal of Materials Science, 2018
    Co-Authors: Pieter Samyn, Thomas Öhlund, Ahmed Barhoum, Alain Dufresne
    Abstract:

    The introduction of nanoparticles (NPs) and nanostructured materials (NSMs) in Papermaking originally emerged from the perspective of improving processing operations and reducing material consumption. However, a very broad range of nanomaterials (NMs) can be incorporated into the paper structure and allows creating paper products with novel properties. This review is of interdisciplinary nature, addressing the emerging area of nanotechnology in Papermaking focusing on resources, chemical synthesis and processing, colloidal properties, and deposition methods. An overview of different NMs used in Papermaking together with their intrinsic properties and a link to possible applications is presented from a chemical point of view. After a brief introduction on NMs classification and Papermaking, their role as additives or pigments in the paper structure is described. The different compositions and morphologies of NMs and NSMs are included, based on wood components, inorganic, organic, carbon-based, and composite NPs. In a first approach, nanopaper substrates are made from fibrillary NPs, including cellulose-based or carbon-based NMs. In a second approach, the NPs can be added to a regular wood pulp as nanofillers or used in coating compositions as nanopigments. The most important processing steps for NMs in Papermaking are illustrated including the internal filling of fiber lumen, LbL deposition or fiber wall modification, with important advances in the field on the in situ deposition of NPs on the paper fibers. Usually, the manufacture of products with advanced functionality is associated with complex processes and hazardous materials. A key to success is in understanding how the NMs, cellulose matrix, functional additives, and processes all interact to provide the intended paper functionality while reducing materials waste and keeping the processes simple and energy efficient.

  • Review of recent research on flexible multifunctional nanopapers
    Nanoscale, 2017
    Co-Authors: Ahmed Barhoum, Thomas Öhlund, Pieter Samyn, Alain Dufresne
    Abstract:

    Traditional paper and Papermaking have struggled with a declining market during the last few decades.Traditional paper and Papermaking have struggled with a declining market during the last few decades. However, the incorporation of nanotechnology into Papermaking has brought possibilities to develop low-cost, biocompatible and flexible products with sophisticated functionalities. The functionality of nanopapers emerges from the intrinsic properties of the nanofibrous network, the additional loading of specific nanomaterials (NMs), or the additional deposition and patterning of thin films of nanomaterials on the paper surface. A successful development of functional nanopapers requires understanding how the nanopaper matrix, nanofillers, nanocoating pigments, nanoprinting inks, processing additives and manufacturing processes all interact to provide the intended functionality. This review addresses the emerging area of functional nanopapers. This review discusses flexible and multifunctional nanopapers, NMs being used in nanopaper making, manufacturing techniques, and functional applications that provide new important possibilities to utilize Papermaking technology. The interface where NM research meets traditional Papermaking has important implications for food packaging, energy harvesting and energy storage, flexible electronics, low-cost devices for medical diagnostics, and numerous other areas.

Dariusz Danielewicz - One of the best experts on this subject based on the ideXlab platform.

  • Properties and fibre characterisation of bleached hemp, birch and pine pulps: a comparison
    Cellulose, 2017
    Co-Authors: Dariusz Danielewicz, Barbara Surma-Ślusarska
    Abstract:

    The Papermaking potential of bleached kraft pulps made from hemp stalks, hemp woody-core and hemp bast fibres was studied and compared with that of bleached birch pulp and pine kraft pulp. It has been shown that among the pulps from these raw materials, hemp stalk pulp has the most useful properties for Papermaking. The disadvantages of hemp woody-core pulp and hemp bast fibre pulp as Papermaking intermediates proved to be low tear resistance and low tensile strength, respectively. Results indicate that the main reasons for the low tensile strength of hemp bast fibre pulp are the low susceptibility of their fibres for internal fibrillation and low hemicellulose content. The technology used in this work for the processing of hemp bast fibres into Papermaking pulp made it possible to obtain pulp with high α -cellulose content from this fibrous raw material with a high yield in a much simpler way than when such pulps are obtained from wood.